else without a previous if

Projects Programming
1

I don't understand this message telling me 'else without a previous if'.

This is my code :

if(PRV < 145)
{
digitalWrite(Y1, HIGH);
}
else
{
digitalWrite(Y1, LOW);
}
delay(100);

2

Please post the complete real program that causes the error using code tags when you do

3

Probably caused by a stray semicolon.

if (x < y); // malplaced ;
{
  yes();
}
else
{
  no();
}
4 
const int Y1 = 7; 
const int Y2 = 6;
const int Y3 = 5;
const int R1 = 4;
const int R2 = 3;
const int R3 = 2;
const int PR1 = A1;

int PRV = 0;

void setup() {
  Serial.begin(9600);
  pinMode(Y1, OUTPUT);
  pinMode(Y2, OUTPUT);
  pinMode(Y3, OUTPUT);
  pinMode(R1, OUTPUT);
  pinMode(R2, OUTPUT);
  pinMode(R3, OUTPUT);
  pinMode(PR1, INPUT);
  int PRV = 0;
}

void loop() 
{
PRV = analogRead(PR1); 
Serial.print(analogRead(PR1));

  Serial.print("\t");
  Serial.println();
  
  if(PRV < 145)
  {
  digitalWrite(Y1, HIGH);
  }
  else
  { 
  digitalWrite(Y1, LOW);
  }
  delay(100);

Is this better?

5

There is missing a final } to end "void loop()", you are redeclaring "PRV" in setup() for no reason and you are calling analogRead twice on loop() - once is enough. But there are no apparent reason for the error you get.